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831.
Richard D. Margerum Stephen M. Born 《Journal of Environmental Planning and Management》1995,38(3):371-392
Integrated environmental management (IEM) and related concepts promoting holistic approaches to environmental management have been evolving rapidly over the past few decades. Although considerable research has examined the substantive dimensions of these concepts, practitioners have forged ahead applying IEM without a clear operational model. The authors link elements of ecosystem management and related fields with interaction to offer a new operational definition and practice paradigm. Interaction among stakeholders and with the public generally is the key operational component for IEM. Focusing on stakeholder interactions, the authors analyse the principle communication and conflict resolution tools employed in integrated approaches. Two illustrative cases from the state of Wisconsin demonstrate the application of interaction techniques and tools in pursuing integrated environmental management. 相似文献
832.
Shirley Ali Khan is the Director of the Environmental Responsibility Centre at the University of Hertfordshire, and Dr Stephen Martin is a Senior Executive of COUNTEC, Milton Keynes, UK. 相似文献
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834.
The effects of a single fertilizer treatment (ammonium phosphate at 841 kg/ha, plus dolomite at 336 kg/ha) and cattle exclusion were studied in two meadows in the Sierra Nevada of California in the USA. Grazing exclusion had no effects on soil bulk density during the three years of the study. Fertilization had no effect on total soil nitrogen, soil pH, or crude protein concentrations in graminoids or forbs. Saturated soils and the development of anaerobic conditions close to the surface may have led to denitrification and the loss of usable nitrogen. Fertilization did result in short-term (one- to two-year) increases in available soild phosphorus in the drier of the two meadows, and in total phosphorus concentrations in graminoids and forbs, which were otherwise generally deficient in phosphorus. Few changes in plant species composition or production were detected, although a combination of fertilization and grazing exclusion increased forb production in the drier meadow. Based on our initial results, fertilization with phosphorus was the recommended treatment for meadow improvement projects in the central Sierra Nevada. 相似文献
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838.
Harvey D. Blankespoor Stephen C. Cameron John Cairns Jr. 《Environmental management》1985,9(5):455-458
Two species of pulmonate snails,Lymnaea cat-ascopium andPhysa integra, were collected from Douglas and Houghton Lakes. Snail populations from the former lake (pristine) had never been exposed to copper sulfate, whereas those from the latter one (treated) had been subjected to the molluscicide for more than 40 years. Molluscs from the treated lake were more resistant to the copper at concentrations of 0.5 and 1.0 ppm than those from the pristine lake. Furthermore, larger lymnaeids had a higher survival rate than smaller ones. 相似文献
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840.
Stephen P. Leatherman 《Environmental management》1989,13(1):109-115
A study of historical storm-induced changes along the south shore barriers of Long Island (Fire Island Inlet to Southampton), New York, USA, was undertaken in an effort to determine the relative roles of different transport processes in barrier migration. Inlets were found to have a profound effect on the barrier system, largely controlling its landward migration, based upon maps, charts, and aerial photographs from the seventeenth century to the present. Salt marshes became established principally on the broad intertidal bay shoals left by a closed or slowly migrating inlet. Inlets along this microtidal coast are now stabilized by jetties, which may have a negative effect on long-term barrier-island migration. 相似文献